Water-purifier.



N0. 7l2',77|. Patented Nov. 4, I902.

G. M. DAVIDSON.

WATER PURIFIER.

(Application filed July 2, 1902.) (No Model.) 6 Sheets-Sheet l.

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No. 7I2,77l.' Patentd Nov. 4, I902.

G..M. DAVIDSON.

WATER PURIFIER.

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Patented Nov. 4, i902.

G. M. DAVIDSON.

WATER PUBIFIER.

(Application filed July 2, 1902.)

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(N0 Model.)

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No. 7l2,77l. Patented Nov. 4. I902.

G. M. DAVIDSON.

WATER PURIF'IER.

(Application filed. July 2, 1902.)

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No. 7l2,7 7'|. Patented Nov. 4, I902;

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WATEB PUBIFIEB.

(Application filed July 2, 1902.)

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NlTE STATES;

GEORGE M. DAVIDSON, OF OAKPARK, ILLINOIS.

\NATER-PURIFIER.

SPEGIFICATION forming part of Letters Patent No. 712,771, dated November4, 1902.

Application filed July 2,1902. Serial No. 114,117. lllo model.)

To all whom it may concern:

Be it known that LGEoRGE M. DAvIDsoN,a citizen of the United States,residing at Oakpark, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Water-Purifiers, ofwhich the following is a specification.

This invention relates to that class of mechanisms known aswater-purifiersthat is, apparatus or mechanism arranged to mix predetermined quantities or proportions of cl1em-' icals with feed-waterpreliminary to the feeding of the same into a steam-boiler, so as to'minimize as much as possible the deleterious actions of ordinary waterson the boiler-shell during the generation of steam, all of which willmore fully hereinafter appear.

The principal object of the invention is to provide a simple,economical, and efficient water-purifier.

A further object is to provide a Water-purifier with economical andefficient means for automatically operating the different mechanismssuchas the pumping, stirring, and feeding mechanisms.

Further objects of theinvention willappear from an examination of thedrawings and the following description and claims.

The invention consists principally in a chemical-feed tank, stirringmechanism movably mounted therein, pump mechanism secured thereto andconnected with the chamber thereof, a water-supply pipe, and a tiltingvessel arranged to receive the discharge of the water-supply andchemicals and connected with the operating mechanisms to operate thesame by andduring its movements.

The invention consists, further, in the combination of a chemical-feedtank, stirring m echanismin such feed-tank, a water-supply pipe, pumpmechanism secured to the chemical-feed tank and connected therewith andprovided with a discharging-spout arranged to discharge the chemicalsinto the water-supply pipe, and a tilting vessel provided with aplurality of measuring mixing-chambers arranged to receive the dischargeof the mixed Water and chemical supply and connected with the pump andstirring mechanisms to operate the same by and during its movements.

The invention consists, further and finally,-

in the features, combinations, and details of construction hereinafterdescribed and claimed.

In the accompanying drawings, Figure 1 is a side elevation of the feedand mixing apparatus constructed in accordance with these improvements;Fig. 2, a vertical sectional elevation of the same, taken through theline 2 of Fig. 3 looking in the direction of the arrow; Fig. 3, a frontelevation of the mechanisms looking at them from the left hand of Figs.1 and 2; Fig. 4, an elevation, partly in section, of a portion of themechanism and apparatus for showing the level of the liquids in thechemical-feed tank; Fig. 5, an enlarged vertical sectional elevation,taken through one of-the pumps, showing its connection with thechemical-feed tank; Fig. 6, a sectional elevation of the building andentire appara tus for stirring, feeding, mixing, and storing thepurified water, as hereinafter more fully described; Fig. 7, a plansectional View of the same, taken on about line 7 of Fig. 6; and Fig. 8,a plan sectional View of the mechanism shown in Fig. 6, taken on line 8and looking in the direction of the arrow.

In the art to which this invention relates it is well known that allnatural boiler feedwaters contain more or less incrusting solid or otherdeleterious matter which if fed into the steam-boilers is during thegeneration of steam deposited in the form of scale on the inner surfacethereof, all of which acts to illcrust the fines and sheets, and therebyto lessen the efficiency of the boiler as well as resulting in extraconsumption of fuel and decrease in the life of the boiler. It is alsowell known that a great many chemicals may be used and mixed with thefeed-water be fore it enters the boiler to precipitate and remove saidsolids or other deleterious substances,'so that the water when used willnot have the objectionable actions above noted on the boiler.

The principal object,tl1erefore,of this invention is to provide asuitable mixing apparatus, one which measures the chemicals and water inpredetermined quantities and thoroughly mixes them before they enter asettling tank or tanks preliminary to being fed into the boiler, andmeans in' the settlingtanks for thoroughly agitating the purified waterand sediment therein,so as to obtain the best results, all of which willmore fully hereinafter appear.

In constructing and arranging an apparatus in accordance with theseimprovements I provide a preliminary chemical-mixing tank a, of thedesired size and shape, preferably cylindrical in contour, and place itin a vertical position, as shown particularly in Figs. 1 and 2 of thedrawings. This preliminary chemical-mixing tankis, as above suggested,provided for the purpose of preliminarily mixing the chemicals with thedesired quantity of water in order to primarily dissolve and mix themand is provided-with a screen I), which acts as a strainer to separatethe liquid from the coarse solid elements,'so that the mixed chemicalsand water may be drawn off through a pipe 0, which I will hereinafterterm the chemical-supply pipe.

In order to thoroughly mix this chemical solution after it has beenprimarilydissolved or mixed with the requisite amount of water, achemical mixing and feed tank d is provided, which is made preferably inthe shape of a cylinder vertically arranged and open at the top and intowhich the chemical-supply pipecdischarges. This chemical-supply pipe, asshown in the drawings, is provided with a plug-valve e, which may beopened and closed whenever desired or necessary-that is,whenever it isdesirable to supply the chemical .mixing and feed tank with a freshsupply.

of chemicals the plug-valve is opened, and whenever it is necessary toshut off such supply the plug-valve is closed, all of which will beunderstood and appreciated by those conversant with the art.

To thoroughly mix and keep the chemical solution stirred and incondition for use in the chemical-feed tank above described, stirrers orheaters fare arranged, mounted upon a vertical shaft g, in turnrotatably mounted in the axial center of such feed-tank. The lower partof this rotatable stirrer-shaft has a stepped bearing h in the lower orbottom part of the chemical-feed tank, and the up per part is rotatablymounted in the crossbar 11 on the upper part of the tank. The lower partis separated from the' upper part by means of a wire mesh or scrcenj,which serves to strain the liquid and keep the coarse solids above thesame and also, as hereinafter set forth, to permit nothing but liquid orthe finest solids from passing out of the tank.

In order to measure and feed the chemical solution so that it may bemixed with the requisite quantity of water-supply, the chemical-feedt-ankls provided with two pumps and 7;, connected therewith at the lowerportion through the instrumentality of the Ts Z.

and Z. These pumps are provided at or near their upper portion withdischarge-spouts m thereof, so that just before the water passes out ofsuch water-supply pipethe chemicals are fed therein in order to bethoroughly mixed with the water and in the requisite quantities. It ishighly desirable that these quantities of chemicals and water bemeasured with some care and mixed in the re quired proportions in orderto obtain the desired results, and also that it be done as economicallyas possible. To obtain this result, a tilting measuring vessel 1) isprovided and mounted upon a pivot q directly under the discharge of themixed water and chemicals, so that it may be tilted from side to side.This tilting and measuring vessel is provided with two chambers 19 and19 so that whenit is in the position shown in Fig. 3 the mixed water andchemicals may flow into the chamberp until it is nearly filled. Whensuch chamber is nearly filled, it counterbalances the weight of theother end of the tilting vessel, depresses it, and at the same timeraises the other, so that the water may flow out through the dischargeopening 29 of such chamber and into a trough r at one side thereof,which trough leads to and deposits the mixed chemicals and water in asettlingtank 5. The outer ends of each of these chambers are curved, asshown particularly in Fig. 3, so that as the water rises during thetilting action of the vessel it does not get a chance to flow over thesides. These ends are not only curved, but are also bent inwardly, asshown particularly in Fig. 1, so as to confine the water at thedischarge-point into a consistent stream, and thereby prevent splashing.

While the chamberp is emptying the chamber 13 is being filled, and whenthe latter is filled it in turn is depressed, returning the opposite endof the tilting vessel to the position shown in Fig. 3. These chambersare of a predetermined size, which is best reached by determining thequantities of water and chemicals that should be mixed, and during theirtilting operations operate, by means of the mechanisms hereinafterdescribed, the pumping and stirring mechanism, thereby feeding thedesired amount of chemicals into the water-supply and during theoperations of the vessel only. In order to operate the pumps during thetilting operations of the measuring vessel, the plnngers u of such pumpsare connected to a walking-beam/v, which is rotatably mounted on a shaftw. The ends of these walking-beams are connected by means of chains asand a," with studs 00? on each end of the tilting vessel. An examinationof the drawings, particularly Fig. 3 thereof, will show that when theparts are in the position shown in such figure and as the vessel isbeing tilted downwardly and to the left the pump 7c is operated or theplunger thereof, so as to furnish a predetermined quantity'of mixedchemical to the water-supply pipe. It will be understood that thewater-supply is constantly running and that the pump is intermittentlyacted and only during the tilting operations of the tilting vessel. Fromthis description of construction and operation it will be seen that acertain predetermined quantity of chemicals is fed to each side of themeasuring vessel in proportion to the amount of other liquid which itwill take to fill the same. In other words, the water-supply is constantand the tilting operations and chemical-supply intermittent.

It is desirable to provide means for automatically rotating thebeater-shaft g. To accomplish this, the horizontal shaft to, above setforth, is provided with a bevel-gear y, meshing with a bevel-pinion y onthe upper end of the beater-shaft. The outer end of the horizontal shaftis provided with a sprocketwheel g around which a chain y passes, theends of such chain being connected to studs g secured to each end of thetilting vessel. By this construction and arrangement it will be seenthat as the tilting vessel is operated it causes rotations of thebeater-shaft and the heaters thereon, all of which serves to thoroughlyagitate and assist in dissolving the chemicals in the chemical-feedtank. It is also desirable to have some means by which the level of theliquids in the chemical-feed tank may be determined easily. For thispurpose a stand-pipe z is secured to and connected with suchchemical-tank. (See Figs. 3 and 4.) This stand-pipe is provided with afloat z, to which is secured a-gradnated pole .2 which extends outthrough the upper end thereof, so that the operator may readily see thesame and obtain the necessary information.

Bufier-springs 30 are used to lessen or absorb the shocks or jars due tothe stopping of the tilting vessel at each limit of its motion.

As shown in Figs. 6 and 7, the mixed feedwater and chemicals aredischarged into troughs r and 7, one to the right and the other to theleft of such figures, which conduct such liquids to the settling-tanks sand 3. After these tanks are filled or partially filled with the mixtureof chemicals and wateritis desirable that the sediment from formermixtures be thoroughly agitated'and mixed in the settling-tanks in orderto hasten the settling of the new precipitate. To accomplish thisresult, a steam-pump 10 is provided,

which is also used for furnishing a supply of water to the Water-supplypipe'O by means of the pipe 11. (See Fig. 6.) This steam-pump has itsinlet 12 connected to branch pipes 13 and 14, leading into each of thesettling-tanks.

These branch pipes have their outer ends 15- pipes 2O, which rest at ornear the bottom of such tanks.

The operation is as follows: The valves 21 and 22 on the ordinary inletand discharge pipes, which are used when the mixing apparatus abovedescribed are in operation, areclosed, while the valves 23 and 24 on theinlet and outlet pipes just above described are opened. The pump is thensupplied with steam from the boiler 18 and begins its operation, so thatthe mixed feed-water and chemical at or near the top of thesettling-tank is drawn into the pump through the pipes 13, 14, 15, and16 and forced into the bottom of the settling-tanks through the pipes 19and 20, thereby maintaining a circulation of such liquid in such tanks.After the contents of the tanks have been agitated for a few minutesthey areallowed to stand until the sediment has settled. The purifiedwater is then drawn from the settling-tanks through the pipes 15 and 16,attached to the floats 17, and transferred to a suitable storage-tank,or it may be drawn direct from the settling-tanks to the boiler.

In order to discharge the purified water, valves 24 and inlet-valve 21may be closed and valves 23 and discharge valve 22 left open. Theagitation of the liquid in the settling-tanks ceases while valve 24 isclosed, allowing the sediment to settle to the bottom, and the floatingor movable pipes then serve in the capacity of discharge-pipes fordrawing off the purified water. During theintervals of agitation of theliquid and precipitates these movable pipes served,in connection withpipes 19 and'20, as means for producing the desired circulation andagitation. The intervals of agitation and tranquillity are thereforeintermittent, and it will be readily apparent that the Water drawn off"during the intervals of complete tranquillity is as a result morecompletely free from sediment than it could possibly be if drawn offduring the agitation, and it is also evident that the periods ofagitation are necessary to quickly settle the sediment. The doublecapacity in which the floating pipes act is therefore a characteristicfeature of this'mode of operation, and the circulation of the liquid isthrough the movable pipe and pump to the perforated pipe at the bottomof the tank and through the liquid, making a complete continuous circuitduring the desired intervals of time.

I claim 1. In a water-purifier of the class described, the combinationof a chemical-feed tank, stirring mechanism movably mounted therein,pump mechanism secured thereto, a watersupply pipe arranged to receivethe chemicalsupply as it passes from the pumps on the chemical-feedtank, and a tilting vessel arranged to receive the discharge of themixed chemical and water supply and connected with the pumping'mechanismto operate the same by and during its'movements, substantially asdescribed.

' the combination of a chemical-feed. tank provided with tworeciprocating pumps connected therewith, beater mechanism rotatablymounted therein, a Water-supply pipe arranged to receive the dischargefrom the two chemical-pu mps, and a tilting vessel provided with aplurality of measuring-chambers arranged underneath thedischarge-opening of the water-supply pipe and connected with thepumping and stirring mechanism to intermittently operate the same,substantially as described.

4. In a water-purifier of the class described, the combination of achemical-mixing tank provided with rotatable stirrer and beatermechanism, two vertically-arranged reciprocating pumps connected withthe bottom of such chemical-feed tank, a walking-beam to which ispivotally connected the plungers of the reciprocating pumps, awater-supply pipe arranged to receive the discharge from thechemical-pumps, and atilting vesselprovided with a plurality ofmeasuring-chambers arranged under the discharge-opening of thewater-supply pipe and connected with the walking-beam of the pump andwith the stirring beating mechanism to intermittently operate the same,substantially as described.

5. In awater-purifier of the class described, the combination of achemical-feed tank provided with rotatable stirrer and beater mechanism,two reciprocating pumps vertically arranged and connected with thebottom portion of such chemical-feed tank, gear mechanism connected withthe beater mechanism, a horizontal shaft provided with a sprocketwheeland gear mechanism connected with the gear mechanism of the stirrer andbeater mechanism, a walking-beam pivotally connected with the plnngersof the verticallyarranged chemical-pumps, a water-supply pipe arrangedunderneath so as to receive the chemicals as they are discharged fromthe chemical-pumps, and a tilting vessel provided with a plurality ofmeasuring-chambers arranged under the discharge-opening of thewater-supply pipe and connected with the Walking-beam of the pump andthe sprocketwheel of the beater mechanism to intermittently operate thesame, substantially as described.

6. In a water-purifier of the class described, a combination of .meansfor measuring and mixing water and chemicals together, a settling-tankfor receiving the mixed water and chemicals, a pump provided with aninletpipe and a discharge-pipe, pipe mechanism arranged in the bottom ofthe settling-tank and connected with the discharge-pipe of the pump, andpipe mechanism arranged in the settling-tank and connected with theinletpipe of the pump, substantially as described.

7. In a Water-purifierof the class described, a combination of means formeasuring and mixing water and chemicals together, a settling-tank forreceiving the mixed water and chemicals, a pump provided with aninletpipe and a discharge-pipe, perforated pipe mechanism arranged inthe bottom of the settling-tank and connected with the dischargepipe ofthe pump, and pipe mechanism movably mounted in the settling-tank andconnected with the inlet pipe of the pump Whereby circulation of liquidthrough the pivoted pipe and pump to the perforated pipes and throughthe liquid in the settling-tank may be produced, substantially asdescribed.

8. In a water-purifier of the class described, the combination of meansfor measuring and mixing water and chemicals together, a settling-tankfor receiving the mixed Water and chemicals, a pump provided with aninletpipe and a discharge-pipe, a discharge-valve in suchdischarge-pipe, a branch pipe connected with the discharge-pipeintermediate the discharge-val ve and pump and extending into thesettling-tan k, a pipe movably mounted in the settling-tank connected atone end with the inlet-pipe of the pump, and a float for suspending theopposite end of such movable pipe in the liquid of the settlingtank,substantially as described.

GEORGE M. DAVIDSON.

Witnesses:

THOMAS F. SHERIDAN, HARRY IRWIN CROMER.

